I assume the stage I and II for The Mending of Dominaria don't do anything since we have no librRIES.
Triumph Of Gerrard
Tap the Goblin
Weatherlight (4/5; Flying; library ability; Crew 3)
(T) Bloodstone Goblin (2/2; Whenever I cast a spell, if that spell was kicked, ~ gets +1/+1 and gains menace ueot)
(T) Tolarian Scholar (2/3)
(S) Gaea's Protector (0/4 Defender) ~Icy~
Deep Freeze (EC, Enchanted creature has base power and toughness 0/4, has defender, loses all other abilities, and is a blue Wall in addition to its other colors and types.)
Triumph Of Gerrard (E, (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Put a +1/+1 counter on target creature you control with the greatest power.
III — Target creature you control with the greatest power gains flying, first strike, and lifelink until end of turn.)
(S) D'Avenant Trapper (3/2, Whenever you cast a historic spell, tap target creature an opponent controls. (Artifacts, legendaries, and Sagas are historic.))
Graveyard: Serra Disciple